The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 1985
Filed:
Feb. 17, 1983
Applicant:
Inventors:
Timothy D Finch, Wirral, GB;
Stuart W Beavan, Birkenhead, GB;
Assignee:
Lever Brothers Company, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H07J / ; C11D / ;
U.S. Cl.
CPC ...
2521881 ; 2521882 ; 25218821 ; 252105 ; 252107 ;
Abstract
A photobleach system is disclosed comprising a synergistic mixture of an electron donor and a visible/ultraviolet radiation absorbing compound (a chromophore acceptor) which is capable of, in an excited electronic state, undergoing electron transfer from said electron donor. A composition comprising said photobleach system and use of the system or composition in bleaching dyes and textiles are also disclosed. A preferred electron donor is sodium sulphite. Preferred chromophore acceptors are water-soluble metallated phthalocyanines and naphtalocyanines.